Police in Detroit, Michigan, on Sunday expressed “profound sorrow” at the fatal shooting of a 7-year-old girl in a police raid.

Aiyana Jones was shot and killed by police executing a search warrant as part of a homicide investigation, Assistant Chief Ralph Godbee said in a statement.

“This is any parent’s worst nightmare,” Godbee said. “It also is any police officer’s worst nightmare. And today, it is all too real.”

The warrant was executed about 12:40 a.m. ET Sunday at a home on the city’s east side, Godbee said. Authorities believed the suspect in the Friday shooting death of 17-year-old high school student Jarean Blake was hiding out at the home. Blake was gunned down in front of a store as his girlfriend watched, Godbee said.

Preliminary information indicates that members of the Detroit Police Special Response Team approached the house and announced themselves as police, Godbee said, citing the officers and at least one independent witness.